Levantamento de doses de radiação ocupacional em exames radiográficos dos boletos e falanges distais de equinos
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Resumo
Veterinary medicine has increasingly used X-rays for the diagnosis of
various diseases, especially osteoarticular diseases of the fetlocks and
distal phalanges. These usually require additional radiographic exposures,
resulting in significant radiation doses, which pose a risk to occupational
health. This study evaluated radiation doses from primary and scattered
radiation, with an emphasis on the ambient dose equivalent (H*(10)) and
the personal dose equivalent. It used an X-ray machine typical of
veterinary practices, an ionisation chamber, a ring-shaped
thermoluminescent dosimeter, and an equine anatomical specimen.
Cassettes measuring 18x24 and 35x43 cm were used. The X-ray beam
collimations varied in dimensions of 18x24, 24x30, 30x40 and 35x43 cm,
in addition to mAs at 5, 2.5 and 1.6. The kVp was kept constant at 70. A
higher risk was demonstrated in the D45°L-PaMO oblique radiographic
projection. Doses of 0.01882 mSv/exposure were measured in the hand of
the IOE carrying the cassette and 0.00026 mSv/exposure for the IOE
carrying the X-ray machine, resulting in that to reach the annual
investigation level of 150 mSv, it would be necessary to participate in
approximately 110 radiographic examinations (patients/month or ± 3 to 4
patients/day) and to reach the monthly investigation level of 20 mSv,
approximately 1,063 doses or an average of 5 patients per day would be
necessary. The benefit of collimation comparing H*(10) at 70 kVp and 1.6
mAs was demonstrated with collimation 35x43 cm: 0.001013 mSv and
18×24 cm: 0.000223 mSv. The dose is drastically reduced by decreasing
the mAs. The dose ratio between the 5 mAs and 1.6 mAs techniques is
approximately 5/1.6 ≈ 3.125.
Como referenciar
GOULART, MAURICIO E.; POTIENS, MARIA da P.A. Levantamento de doses de radiação ocupacional em exames radiográficos dos boletos e falanges distais de equinos. Revista Sociedade Científica, v. 8, n. 1, p. 2751-2760, 2025. DOI: 10.61411/rsc2025122518. Disponível em: https://repositorio.ipen.br/handle/123456789/49852. Acesso em: 05 May 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.